mysql_affected_rows Get number of affected rows in previous MySQL operation intmysql_affected_rows resource link_identifier mysql_affected_rows returns the number of rows affected by the last INSERT, UPDATE or DELETE query associated with link_identifier. If the link identifier isn't specified, the last link opened by mysql_connect is assumed. If you are using transactions, you need to call mysql_affected_rows after your INSERT, UPDATE, or DELETE query, not after the commit. If the last query was a DELETE query with no WHERE clause, all of the records will have been deleted from the table but this function will return zero. When using UPDATE, MySQL will not update columns where the new value is the same as the old value. This creates the possibility that mysql_affected_rows may not actually equal the number of rows matched, only the number of rows that were literally affected by the query. mysql_affected_rows does not work with SELECT statements; only on statements which modify records. To retrieve the number of rows returned by a SELECT, use mysql_num_rows. If the last query failed, this function will return -1. ]]> The above example would produce the following output: ]]> The above example would produce the following output: See also mysql_num_rows, and mysql_info.